[clang] [clang] Set correct FPOptions if attribute 'optnone' presents (PR #85605)

[Serge Pavlov via cfe-commits]

spavloff wrote:

Hi @SLTozer,

Thank you for the report. There is an issue somewhere around the code that reads/wtites records FP_PRAGMA_OPTIONS and/or FLOAT_CONTROL_PRAGMA_OPTIONS, which sometimes manifest itseld in broken synchronization of FP options. I will prepare fix soon.

https://github.com/llvm/llvm-project/pull/85605